| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "components/blocked_content/list_item_position.h" |
| #include "base/check_op.h" |
| |
| namespace blocked_content { |
| |
| ListItemPosition GetListItemPositionFromDistance(size_t distance, |
| size_t total_size) { |
| DCHECK(total_size); |
| if (total_size == 1u) { |
| DCHECK_EQ(0u, distance); |
| return ListItemPosition::kOnlyItem; |
| } |
| |
| if (distance == 0) |
| return ListItemPosition::kFirstItem; |
| |
| if (distance == total_size - 1) |
| return ListItemPosition::kLastItem; |
| |
| return ListItemPosition::kMiddleItem; |
| } |
| |
| } // namespace blocked_content |
